Malicious PDF — malware analysis report

Static analysis result for SHA-256 c87b269cb060c21f…

MALICIOUS

PDF

44.0 KB Created: 2020-08-23 13:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ff6ae1d94248fd8a43ab0165aa038e SHA-1: 02e1c92c03f36edd8d670af6628b0c8e435bb0dd SHA-256: c87b269cb060c21f41d5bcc22eb026595352ec585e653e41720696075179057d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to 'ttraff.ru/pify', identified as a malicious redirector. The document body, though heavily obfuscated, contains the text 'Bpm dj software free' and the malicious URL, suggesting a lure for users seeking free software. The presence of a malicious redirector indicates an attempt to lead the user to a further stage of attack, likely credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=bpm+dj+software+free
    • http://files.twinlightshome.com/uploads/1/3/1/6/131637308/90543.pdf
    • http://files.x-ring.org/uploads/1/3/1/4/131483209/9000163.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/seboxanova.pdf
    • https://cdn.shopify.com/s/files/1/0457/9409/9366/files/74008737730.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/29865910603.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/73240300905.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/dopulolopuveruperoda.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/tatet.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/safari_online_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/bekavanutarutuwapefe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0152/6948/files/vl_trition_2.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/amiga_os_rom.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/nizudes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5712/files/capital_city_of_all_countries.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/kanizositanunizakamipepo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d6f.bin
8733c08e179ea4993357a74e80c1b8799d4f34c7bb042c40fbeb824b2e8defe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6F 5372 bytes
font_01_sfnt_off00007fb7.bin
b8305a9771aad885f45425e6c22298850592555cea9477e270ef679d6264362c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB7 10568 bytes

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